Dust gun



M. E. LUSK, JR

DUS'l1 GUN Filed March 14, 1938 Patented Dec. 19, 1939 UNITED STATESPATENT-OFFICE DUST GUN Myron E. Lusk, Jr., Quincy, Ill.

Application March 14,

5 Claims.

This invention relates to a dust gun for dispensing powders such asinsecticides. The gun is adapted to be used as a commercial package inwhich the insecticide or other powder may be sold.

One of the objects of the invention is to provide an improved dust gun.

A further object of the invention is to provide a dust gun having rigidportions in telescopic relation and a flexible bellows member,completely enclosed therein and protected by the rigid portions.

Other objects, advantages and capabilities of the invention will appearfrom the following description of a preferred embodiment thereof, takenin conjunction with the accompanying drawing, in which Figure l is asectional view through the improved dust gun;

Fig. 2 is a similar view showing the dust gun with its rigid parts inextended relation;

Fig. 3 is a top plan View, on a larger scale, and

Fig. 4 is a sectional detail, on a still larger scale, taken through acorner and showing the manner of assembly.

Referring to the drawing, the improved gun comprises two outer rigidhousing portions I0 and II, preferably of cylindrical form. The portionsIll and II are of similar size and shape and may suitably be cut from along cylindrical tube of cardboard. Within one of these housingportions, for example within the portion Il, is inserted a connectinghousing portion I2. The housing portion I2 has a snug or sliding fitinto the housing portions IIJ and II. The housing portion I2 is securedto one of the housing portions Ill and II, for example to the housingportion II, by adhesive or any other suitable manner, but has a freesliding relation within the other housing member I0. Thus, as willreadily be seen in Figs. 1 and 2, the housing portion I0 may bereciprocated towards and away from the housing portion II, slidingfreely upon the housing portion I2. The lit between the housing portionsI0 and I2 is such that it is fairly air-tight, particularly when therelative movement is rapid.

Referring now to Fig. 2, it is to be noted that the movement of thehousing member Ill away from the housing member II is limited by theinterior bellows member I3. This bellows member may be in the form of atube of stout crepe paper which is connected to the remote ends of thehousing portions I0 and II. The connec- 1938, Serial N0. 195,744

tion of the bellows member I3 to the ends of the housing portions I0 andII may be eiected in any suitable way. However, in the preferredembodiment of the invention I prefer to close the ends of the gun bymeans of sheet metal discs I4 and I5, the edges of which are spun aroundin known manner so `as nrmly to engage the walls of the housing portionsIll and II. vI prefer to interpose the edges of the bellows member I3between the bead IG of the metal cap, Ill or I5, and the extremities ofthe housing members I0 and II, as best seen in Fig. 4.

The end disc I4 has pivotally mounted thereon a smaller disc Il, thisdisc being provided with a tab portion I8 wherebythe disc Il may berotated with reference to the disc I4. The disc Il and the disc I4 areprovided with elongated arcuate openings I9 and 20 which are adapted tobe brought into register to a greater or lesser degree, or to be movedcompletely out of register by suitable rotation of the small disc II. f

rIhe operation of the gun is as follows. The small disc Il is rotatedwith reference to the disc I4 so as to bring the openings I9 and 20 intoa desired degree of register. The powder which is to be dispensed iscontained within the bellows member I3 and when the package is sold thispowder may practically lill the bellows member I3, as shown in Fig. 1.Owing, however, to the flexible nature of the bellows member I3, thereis an irregular air compartment 2l between the bellows member I3 and therigid housing portions I, II, I2. The housing portions l0 and II aremoved away from each other into the relation shown in Fig. 2 and it willbenoted that the annular chamber ZI around the bellows member I3persists, and in fact is increased by the leakage of air between thetelescope members I0 and I2. The separating movement of the housingportions I0 and II causes air to be drawn inwardly through Ythe openingsI9 and 20. Assuming that the gun is held at a suitable dispensing angleand the two housing portions ID and II are moved together, the airwithin the annular chamber 2l is compressed and this compression isapplied to the bellows portion I3 so that it contracts in radialdirection. The bellows portion I3 is also foreshortened owing to theapproach of the housing portions I0 and II, with the result that astrong blast of air is ejected through the aligned openings I9 and 2l).This blast of air carries with it an amount of powder which depends uponthe angle at which the gun is held and the rapidit`y of approach appliedto the housing portions Ill and II. The amount of powder discharged mayalso be modified by changing the position of the aligned portions of theopenings I9 and 20 with respect to the lowermost side of the gun. .Thatis, the gun is normally used in a more or less horizontal position andthe powder will, consequently, extend along one side of the housing,that is, the lower side. If the gun is rotated axially so as to adjustthe relation of the aligned portions of the openings I9 and 20 towardsthe bulk of the powder, the amount of powder discharged will, of course,be increased.

The bellows member I3, being completely enclosed within the rigidhousing portions IE), II and I2, is protected from accidental rupture.Furthermore, the bellows member I3 is protected from being caughtbetween the telescoping members I and I2 by the compression of the airwithin the annular chamber 2|. This compression, as has been notedabove, moves the bellows member I3 radially inwardly during the periodwhen the housing portions I0 and. II are approaching.

Although the invention has been disclosed in connection with thespecific details of a preferred embodiment thereof, it must beunderstood that such details are not intended to be limitative of theinvention except insofar as set forth in the accompanying claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent of the United States is:

1. A dust gun comprising a chamber constituted by two aligned rigidhousing portions in telescoped relation, and a exible tubular bellowsmember within said chamber and secured to remote ends of said housingportions, said bellows member being of a length to permit telescopingmovements of said housing portions while preventing separation thereof,one of said housing portions being provided with a dispensing opening.

2. A dust gun comprising a chamber constituted by two rigid housingportions in telescoped relation, a flexible tubular bellows of stoutcrepe paper within said chamber and secured to the remote ends of saidhousing portions, and closure means at said remote ends, one of which isprovided with a dispensing opening.

3. A dust gun comprising a chamber constituted by two rigid housingportions in telescoped relation, a flexible tubular bellows of stoutcrepe paper within said chamber and secured to the remote ends of saidhousing portions, and closure means at said remote ends, one of which isprovided with a dispensing opening, said bellows member being of alength to permit telescoping movements of said housing portions Whilepreventing separation thereof.

4. A dust gun comprising two rigid tubular portions, another rigidtubular portion secured within one and having a tight sliding nt in theother, a tubular bellows member located within said rigid tubularportions and secured to the remote ends of the first said tubularportions, and closure means at said ends, one of which is provided witha dispensing opening.

5. A dust gun comprising two aligned tubular portions of cardboard,another tubular portion of cardboard secured within one and having atight sliding t in the other, a tubular bellows member located withinsaid rigid tubular portions, and metal ends at the remote ends of thetwo rst said rigid tubular portions, the edges of which are beaded intothe ends of said tubular portions, the ends of the tubular bellowsmember being secured within the beads thus formed, one of said metalends being provided with a dispensing opening and said bellows memberbeing suciently long to permit telescopic movement of the first tworigid tubular portions.

MYRON E. LUSK, JR.

